Question 1 (e)
Classify the following as chemical or physical changes:
e. Passing of electric current, through water and the water breaking down into hydrogen and oxygen gases

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Solution

Recall the definition of physical and chemical change. If the chemical composition is changing then it is a chemical change and if the chemical composition remains same, then it is a physical change.
e. Passing of electric current through water and the water breaking down into hydrogen and oxygen gases - Chemical change

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